Explosions of xenon clusters in ultraintense femtosecond x-ray pulses from the LCLS free electron laser |
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| Authors: | Thomas H Helal A Hoffmann K Kandadai N Keto J Andreasson J Iwan B Seibert M Timneanu N Hajdu J Adolph M Gorkhover T Rupp D Schorb S Möller T Doumy G DiMauro L F Hoener M Murphy B Berrah N Messerschmidt M Bozek J Bostedt C Ditmire T |
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| Affiliation: | Texas Center for High Intensity Laser Science, University of Texas, Austin, Texas 78712, USA. |
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| Abstract: | Explosions of large Xe clusters ( ~ 11,000) irradiated by femtosecond pulses of 850 eV x-ray photons focused to an intensity of up to 10(17) W/cm(2) from the Linac Coherent Light Source were investigated experimentally. Measurements of ion charge-state distributions and energy spectra exhibit strong evidence for the formation of a Xe nanoplasma in the intense x-ray pulse. This x-ray produced Xe nanoplasma is accompanied by a three-body recombination and hydrodynamic expansion. These experimental results appear to be consistent with a model in which a spherically exploding nanoplasma is formed inside the Xe cluster and where the plasma temperature is determined by photoionization heating. |
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